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#pragma once
#include <map>
#include <list>
#include <set>
#include <initializer_list>
#include "object.hpp"
#include "task.hpp"
#include "types.hpp"
#include <functional>
#include <memory>
#include "priority.hpp"
#include "labelled.hpp"
namespace flat
{
namespace core
{
class signal : virtual public labelled, virtual public prioritized
{
public:
object * sender;
package m_package;
priority_t prior;
signal( object * sender,
const std::string& id = "",
void * data = 0,
priority_t prior = priority_t::none);
/* Alias to flat::core::channel::emit() */
bool emit(const std::string& channel) const;
struct package
{
package(void *data) : data(data) {}
template<class T>
T * get() {
return dynamic_cast<T>(data);
}
void * data;
};
};
/* Channel class */
class channel : virtual public labelled
{
/* Post processing signal stacking */
queue<signal> stack;
/* Listeners list */
std::list<std::weak_ptr<listener>> listeners;
/* Synchronous task checking for signals */
task::ptr checker;
/* Channel mapping */
static std::map<std::string, std::weak_ptr<channel>> channels;
public:
channel(const std::string& id = "", priority_t task_priority = priority_t::none);
~channel();
void start();
bool map();
void emit(const signal&);
bool connect(listener::ptr l);
void disconnect(listener::ptr l);
static ptr find(const std::string&);
static ptr create(const string& id, priority_t prior);
void check_and_call();
typedef shared_ptr<channel> ptr;
};
/* Listener class */
class listener
{
std::list<std::string> filters;
bool check_in_filters(const std::string&) const;
callback_t m_callback;
public:
listener( callback_t m_callback,
const std::initializer_list<std::string>& filters = {});
~listener();
void add_filter(const std::string&);
void remove_filter(const std::string&);
bool connect(const std::string&);
bool disconnect(const std::string&);
void invoke(const signal&);
/* Allow to safely bind a functor */
template<class T>
static ptr create( const (T::*method(const object*, void*))& fct,
T* obj,
const std::initializer_list<std::string>& filters = {})
{
return new listener(std::bind(fct, ptr), filters);
}
typedef std::function<void(const object*, signal::package)> callback_t;
typedef shared_ptr<listener> ptr;
};
}
}
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